Steam-boiler feed.



No. 730,547. l PATENTBD JUNE 9,'1903.. G. W. MAUDOUGAIL.

STEAM BUILER FEED.

APPIJIOATION TILED JUNE 2, 1902.

` IATEN'IED JUNE 9, 1903. G. WJMAUDQUGALL.

STEAM BOILER FEED. APPLIoATfoN FILED ,mlm 2. 1902.

2 SHEETS-SHEET 2.

NO MODEL.

jaen/0f a. m 6 Mv w www w. @wm u (mw W 7 o n 26 e w W? d mi: mamsPs'rzus co, Fnorcrumo.. wAsHlNr-Ton,

' a pipe 4, which is connected with the steam- Vspace of the boiler,(not shown,) and through steam is supplied to the lowermost UNrrEDSTATES Patented June 9, 1903.

PATENT. OEEICE.

sTsAMf'BolLER-'Fl-:Ed

SPECIFICATION forming part of Letters. Patent No, 730,547, dated .Tune9, 1903. Application met June 2, letz. senti No. 109,944. (No man.)

To all whom, t may concern: y

Be it known that I, GEORGE W. MACDOU- GALL, a citizen of the UnitedStates, residing at Boonton, in the county of Morris and State of NewJersey, have invented certain new and useful Improvements inSteam-Boiler Feeds, of which the following `is a specification.. l

This invention relates lto new and useful improvements in boiler-feeddevices; and it has for its objects, among others, to providev a simple,cheap, and efcient boilerfeed having provision for the return Y ofcondensed steam to the boiler.

.It has for a further object to provide an efficient device of thischaracter which shall be automatic in its operation, requiring noattention upon the part of the attendant, not liable to get out oforder, and readily applied.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be particularly pointed out in theappended'claims. i

The invention is @leariyniustmted in the.

accompanying drawings, which, with the nul meralsof reference markedthereon, form a v part of this specification, and in which- Figure 1 isa substantially central vertical section showing my improvement with thepistons at their uppermost limit. Fig. 2 is a similar view showing theposition of thel parts when the pistons are at their lowermost stroke.Fig. Sis an enlarged detail in section, showing the piston-valve anditschamber.

Like numerals of reference indicate like:

parts throughout the different views.

Referring to the drawings, 1 designates a cylinder, having a detachablebottom 2, the inner wall of which is preferably tapered toward thecenter, and there it isprovi'ded with a screw-threaded boss 3, intowhich isscrewed this pipe chamber of the cylinder, and through the saidpipe the condensed steam is returned to the boiler.

5 is a piston-,rod to which are secured the three pistons 6, 7, and 8.The pistons 6 and 7 are adapted to move Within the cylinder 1, While thepiston 8 is disposed to move within the separate lcylinder 9. Thesepistons are designed to move water-tight lwithin their cylinders, beingprovided with suitable peripheral packing-rings 10 for this purpose.

11 isa connection between the lower portion of the cylinder 1 and theupper portion. The cylinder 1 has a detachable head12 with ascrew-threaded boss 13, into which is screwed the returncondensatiompipe 14.

The'piston-rod 5 Works through a suitable stuffing-box 15, and outsidethe cylinder 1 it is provided with the tappets or collars or the like,16aud 17. Within the cylinder 9 are the stops 17, against which thepiston 8 is adapted to contact to limit its vupward movement, whileWithin the cylinder 1, near its lower end, are the stops 18, which aredesigned to limit the downward movement of the pistons by the contact ofrthe piston 6 therewith, all as will be readily understood from thedrawings.

19 is an exhaust-pipe leading from the cylinder 9 at a point somewhatbelow its midheight. t

The cylinder 9 is provided with a detachable head 20, 'suitably packed,and connected Awith this cylinder 9 near its upper end. is a pipe21, thelower end of which is connected by elbow 22 with the pipe 23, whichcommunicates with the piston valve cylinder 24, which is arranged withinthe pipe 25, the lower end of which is connected by elbow 26 with thepipe 27, which is threaded into a threaded boss 28 on the cylinder 1just above the' stops .1S thereof, all as clearly illustrated inthedrawings. i

The piston-valve cylinder 24 is disposed within the pipe near its upperend and has an opening 29 in its lower end and an opening 30 in itsupper end. 3l is apiston-valve mountedto reciprocate in saidpiston-valve chamber or cylinder and is provided near each end with aspring-ring 32 to form a tight joint with the walls of the cylinder, asshown. This cylinder may be supported Within the this stem at its outerend, as at 35, is a lever 36, which is pivotally mounted between itsends, as at 37, on an upright or bracket 38,

IOC

` is as follows: As shown, the pistons are all at their uppermoststroke, being thus limited by the stops 17 in the upper portion of thecylinder 9. In this position the space 39 in the cylinder 1 below thepiston 6 and the space 40 in the cylinder 9 above the piston 8 are bothfull of live steam from the boiler, balancing them. Hot water is nowrunning through the pipe 14 on top of the piston 7, that willoverbalance the pistons, causing them to move downward until the piston6 contacts the stop 18 near the lower end of the cylinder l, when thepistons will be arrested in their downward movement. As the pistons movedownward the collar or tappet 16 on the piston-rod will strike the lever36 and moving its free end downward will move the piston-valve 3l upwardto close the opening through the pipe 23 into the valve-cylinder 24. Thepiston 7 will uncover the upper end of the pipe 11, and the piston 6will cover the opening in the lower end of said pipe or receiver 11,when the Water lying on top of the piston will run into said receiver.Now the opening from the pipe 23 into the valve-cylinder 24 being closedby the valve-piston 31 there is no steam passing through the pipe 21into the cylinder 9, and what steam `was in said cylinder 9 above thepiston has been exhausted through the exhaust-pipe 19. The space 39beneath the piston 6 is always full of steamat boilerpressure and willforce the pistons 6, 7, and 8 upward until the upper piston is engagedThe collar by the stops 17 in the cylinder 9. 17, engaging the free endof the lever` 36,

forces the same upward, and this moves the piston-valve 31 downward,opening the comy munication between the pipe 23 and the cylinder 24, andsteam passes through the pipe 21 onto 'the top of the piston 8 andbalances the piston again. The openinginto the lower end of the pipe orreceiver 11 is again opened and the upper end closed, thus letting thewater out of said receiver or pipe 11 down through the opening in thelower end of the cylinder 1 and through the pipe 4 into they boiler.Thus the operation is automatically repeated.

Modifications in detail may be resorted to one cylinder to the other bythe movement of said pistons.

2. The combination of two independent cylinders, a piston-rod common toboth, pistons in one cylinder, a piston in the other, a connection forone cylinder to the other and a valve automatically controlling the iiowfrom one cylinder to the other by the movement of said pistons and aconnection from the boiler to the lowermost cylinder.

3. The combination of two independent cylinders, a piston-rod common toboth, pistons in one cylinder, a piston in the other, a connection forone cylinder to the other and a valve automatically controlling the iowfrom one cylinder to the other by the movement of said pistons, and aconnection from the boiler to the lowermost cylinder, and a connectionbetween the opposite ends of said cylinder.

4. The combination with a cylinder and two pistons therein and anindependent cylinder with a piston therein, of a piston-rod common toall of said pistons, a connection between said cylinders, a piston-valvecontrolling said connection and means actuated by the movement of theypiston-rod to actuate, as set forth.

5. The combination with a cylinder and two pistons therein and anindependent cylinder with a piston therein, of a piston-rod common toall of said pistons, a connection between said cylinders, a piston-valvecontrolling said connection and means actuated by the movement of thepiston-rod to actuate, an exhaust from one cylinder and a connectionbetween opposite ends of the cylinder.

6. The combination with two separate cylinders, pistons in one of saidcylinders and a single piston in the other and a piston-rod common toall, of a communication between said cylinders automatically controlledby the movement of said rod.

7. The combination with two separate cylinders, pistons in one of saidcylinders and a single piston in the other and a piston-rod common toall, of a communication between said cylinders automatically controlledby the movement of said rod and stops within said cylinders for limitingthe movements of the pistons. p

8. The combination with two separate cylinders, pistons in one of saidcylinders and a single piston in the other and a piston-rod common toall, of a communication between said cylinders automatically controlledby the movement of said rod and stops within said cylinders for limitingthe movements of the pistons, and a connection between the opposite endsof the lowermost cylinder alternately opened and closed by the pistontherein.

9. The combination with the cylinders, ar-

ranged in line one small and the other larger,

a single piston-rod for both cylinders, a single piston in one cylinder,a pair of pistons in the other cylinder all mounted on said piston-rod,of tappets on said rod, a connection between said cylinders, a valvecontrolling said con- IOO IZO

neotion, and alever pivotally connected with the stem of said valve withits free end dis the stem of said Valve with its free end disposed inthe path of Said tappets, and a, valveposed in the path of Said tappets.Y cylinder within the connection between the 10. The combination withthe cylinders, artwo cylinders. 15 5 ranged inline one small and theother larger, In testimony whereof I afx my signaturev a singlepiston-rod for both eylindeijs, a single in presencel of two Witnesses.

piston in one e linder, a, pair of istons in the 1 other eylinderllmounted on salipd piston-rod, GEORGE W MACD OUGALL of tappets on saidrod, a connection between Witnesses: lo said cylinders, a valvecontrolling saidcon- SAMUEL TUCKER,

neetion, and a lever pivotally connected with FRANK J. YOUNGS.

